Counterbalancing-spring for window-lifters.



l.T.ALL1VIAND U. LAWRENCE. COUNTEHBALANCING SPRlNG FOR WINDOW LIFTERS. APPUCMWON man rE 5. w18.

1 ,278,554. lzltentedept. l0, mlb.

I Y cupped sprocket wheel, e stationary plate outer end fastened thereto and its inner end provided with a pin projecting into the-inadapted to [it over the seid pin. terior of the said cupped sprocket, :L cup re- In witness whereof We have hereunto set 10 movably fitted intofthe cupped sprocket` to our hands on the'Qnd day of February, 1918. f5v rotate therewith and provided .with a large 'fentml aperture to clear said pin, and e., JOHN T. ALLMAND.

spring packed 'in said cup and having its JOHN D. LAWRENCE. 

